Device for opening and closing attic windows



July 24, 1928. 1,678,020

' F. PETERSEN ET AL DEVICE FOR OPENING 'AND CLOSING ATTIC WINDOWS Filed Jan. 18, 1927 "'*i H J LL II a j a; h La M @6 Ma-WM:

Patented July 24, 19281 I UNITED STATES PATENT OFFICE.

FRITZ PETERSEN AND HERMANN KRU'SSMANN, OF RECKLINGHAUSEN-SUD, GER- MANY, ASSIGNORS TO FIRM OF: TISCHLER & SEICI-ITER, 0F RECKLINGHAUSEN-SUD, I

GERMANY.

DEVICE FOR OPENING AND CLOSING ATTIC WINDOWS.

Application filed. January 18, 1927, Serial No. 161,781, and in Germany May 6, 1926. v

This invention relates to an improved device for opening and closing attic windows by means of a pulling-cord attached to the pulling the cord, the lever jumps with its foot-end in forward direction over the hookand, when yielding the cord, slides then with its smooth rear edge down along said hook, whereby the window is automatically closed, whereupon the lever gets free of the hook and again assumes its initial position with reference to the latter; while, furthermore, improved means are provided, on the one hand, for preventing a sudden lifting by storm-of the window locked in open position, and on the other hand, for making an opening of the closed window from outside by burglars or from inside by undercurrents of wind impossible.

The accompanying drawing illustrates the improved device by way of example in a preferred form of its construction: Fig. 1 is a vertical longitudinal section through an attic window fitted therewith, while Fig. 2 is a rear view of the device.

The lever b, that is pivoted at i to the window by means of a knee-lever r and at its top end somewhat bent in forward direction. is at its front edge provided with notches e and 7, while to its foot-end Z a freely depending cord 0 is attached and guided over a fixed roller a mounted on the window frame.

On said window frame, a depending hook (Z is arranged. I

At the upper end of its straight part, the lever is double-bent and provided with an inclined race as, that in the position of rest of the lever faces the hook (1 ready for its action (see dot-ted lever position, Fig. 1).

The notches e and f of the lever are at their lower parts provided with counterhooks n and o.

The free lower arm of the knee-lever r is hook-shaped at its foot-end, while on the as follows :When pulling the cord 0 for opening the window, the lever b slides first with its inclined race a: and then with its notched front edge along the hook d and, -when yielding the cord, engages by one, of

its notches e, f with said hook, whereby the window is locked in more or less open position, while when further pulling the cord the lever jumps with its foot-end in forward direction over the hook and, when ylelding the cord, slides then with its smooth rear edge down along said hook, whereby the window is automatically closed, whereupon the lever gets free of the hook and again assumes its initial position with reference to the latter; A sudden lifting by storm of the window locked in open position is prevented by the counterhooks n, 0 on the notches e, 7, which in case of such danger bear from below against the hook d. An opening of the closed window from outside by burglars or from inside by undercurrents of wind, is impossible by the fact that in this window position the hook-shaped free foot-end of the knee-lever 1- engages in the notch 8 (see dotted lever position,-Fig. 1), from which it cannot again be disengaged but by pulling the cord 0.

Thus, by the improved device a perfectly stormand burglarproof attic window is created.

What we claim, is

A device for opening and closing attic windows, comprising, in combination, a depending hook and a roller guide both fixed to the window frame, said roller guide having a notch therein, a roller in said roller guide, a knee-lever fulcrumed to the window and having a hook-shaped free foot end for engagement in'said notch with closed window, an operating lever with notched front edge at its top end somewhat bent in forward direction and there pivoted to said knee-lever, said operating lever having a double bend and an inclined race at the upper end of its straight part facing said hook in the closed position of the window, counterhooks at the lower parts of the notches in the front edge of said operating lever, and a cord attached to the lower end of said-operating lever and guided over said of said lever from said hook and When re- I roller with its free end depending therefrom leased to effect a descent of said lever With 10 and adapted When pulled to unlock said its rear edge sliding along said hook until knee-lever from its notch and to effect an the lever again assumes its initial position engagement "of said bpei'ating lever with 'of'rest. said hook thereby holding the Window in 1 open position, and finally when further v FRITZ PETERSEN-L pulled to disengage the notched frontedge HERMAN N KRUSSMANN. 

